A U.S. Border Patrol agent rides an ATV while monitoring the U.S.-Mexico border at the Imperial Sand Dunes on November 17, 2016 near Felicity, California. The 15-foot fence, also known as the “floating fence”, sits atop the dunes and moves with the shifting sands. Border Patrol agents say they catch groups of illegal immigrants and drug smugglers crossing in from Mexico there daily, despite the forbidding terrain. (Photo by John Moore/Getty Images)
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